Alarm apparatus for speedometers for vehicles



0st. 26, 1931. Q P. A. KOURTZMAN1 1,327,989

ALARM APPARATUS FOR SPEEDOMETERS FOR VEHICLES Original Filed Jan. 31, 1929 2 Sheets$heet 1 R'TTG WHEY3 Get. 20, 1931.

P. A. KOURTZMAN 1,827,989,

ALARM APPARATUS FOR S PEEDOMETERS FOR VEHICLES Original Filed Jan. 31, 1929- 2 Sheets-Sheet z 7/7Venfof EWTQQNEYQ.

Patented (jot. 20, I931 UNITED STATES PER ANDERSSON KouarzMAm-orviaarm;swEDEn j ALARM APPARATUS FOR SPEEDOMETERS F03 vEHIoLns Original application filed January 31, 1929, Serial norsaaee i, anainsw aen February :8, 1928, Divided and this application filed April' 1,1980. Se1 iaI No.440,830; I I

The present invention-relates toan alarm apparatus for speedometers for vehicles. The characteristics of the invention consist in the combinat-ion of a rotating disc or wheel receiving its rotation from the movement of the vehicle, two diametrically opposed J I v the welghts. One of the weights carries at its outer end a'pin 57 ,which pin will project beweights located in radial guides on the Wheel and slidable in the same and provided with a pin, which is adapted to cooperate wit-h a 19 hammer for sounding a bell, and two springs located in said guides and each effective to oppose the tendency of one of said weights to move towards the periphery of the wheel under centrifugal force.

This application is a division of applicants co-pending application, Serial No. 336,364, filed January 31st, 1929. V

On the accompanying drawings is shown only by way of example the present inven- 29 tion applied to a' speedometer which has a diagram cylinder provided with an adjustable diagram cord, a signal device and a counting mechanism. Fig. 1 shows the speedometer in side elevatlon. Fig. 2 is avertical sectional view of the upper portion of the speedometer housing and showing the alarm apparatus in side elevation. Fig. 3 is a sectional plan View of the speedometer il lustratin the relative positions of the mechanism at the interior thereof.

alarm apparatus is mounted in the upper part of a speedometer housing lOand is operated from a shaft 24 forming part of a centrifugal of a diagram cord 12, as fully described in my said copending application.

In the upper part of the speedometer house ing, a gear wheel 53 is mounted for rotation,

which in turn meshes with a similar pinion secured on the shaft 24, whereby rotary motion is transmitted to the wheel 53 from the shaft 24. The wheel 53 is provided at its underside with a pair of oppositely disposed guides 53 extending diametrically of the gear wheel, and mounted in said guides at opposite sides of the axis of rotation of the gear wheel are a pair of weights said weights being slidable radially of the gear In the example shown in the drawings, the

device which is used for shifting the position 7 said wheel being in mesh with a pinion 54,-

under thecentrifugal force produced by rotation of the gear. A pair of springs 56 disposed between the outer ends of theiweights and the outer ends of the" guides serve to maintain the weightslnormally in retracted position and toresist outward movement-of gear wheel 53, thereby causing the hammer to swing on its pivot against the tension of a spring 59. Assoon as the said pin has passed out of contact with the hammer,'the

latter is swung in the opposite direction by V the tension o'fits spring so as to strike a bell v6O disposed in the pathofsaid hammer;

In addition to theaudible signaling device. 7 above described,thetspeedometer includes a visible signal ,for indicating when a predetermined speed limit has been exceeded, which is fully described inmy saidcopending application and sinceit does not constitute an essential feature of the present application, it is believed tha'ta general reference thereto will be sufficient herein. In Fig. 3, the signal -member 40 is carriedfat the end of an arm 37 of a double-armed lever pivoted on a pin 38, the lever being movable axially ofv said pin againstthe action of a'sprin g 47. Theother arm 39rof said double-armedlever lies in the path of a projection 41 carried on 'a wheel 17 secured to a shaft on which are'mounted apair of'pulleys 18 by means of which rotary motion proportionate tothe speed 'ofrotation ofthe'shaft 24 is transmitted to the wheel 17. By this means the lever 39'is actuated to raise the signaling member 40 so that it' will be visible through the opening 1 in the 'speed- I ometer housing, as shown in The arms 37 and 39 are articulated together and maintained in operative relation bya spring 51, whereby, the arm is cushioned so as to pre -1. vent damage in case of excessive speed. The speed recording mechanism is indicated at as in Fig. 3, and clamping means for securing the speedometer on a" suitable support is indicated at 69, 7 O in Fig. 1. None of these fea- 100 2 j reevestures, however, are essential to the present invention.

Instead of being operated by the shaft 9A the alarm apparatus maybe operated by some.

other movable part of the'speedometer. The alarm apparatus may, if desired, be mounted in some part of the speedometer casing other than in the upper part. For instance, it may be mounted in the lower part of thespeedom- 10 eter and be operated by some other shaft which receives its rotation from themovement of the vehicle. V In short the separate parts of the alarm I apparatus shown may of course be varied inp many ways, provided only'the characteristics of the invention are retained. The speedonr eter can be used on many difierent kinds of vehicles, for example motor cars, locomotives etc. i

It is believed that the operation of'the device will be apparent fromthe foregoing Whenever the gear 53 is'rotated at sufficient speed to cause the weights 55 to move outward against the tension of the springs 56, the pin 57 carried by one'of said weights will contact with the beveled portion of the hammer shown clearly in Fig. 3, andwill trip said hammer or cause it to "moveaway from the bell 60. As soon as'the pin has passed beyond said beveled portion, however, the hammer will be returned with a quick motion so as to strike the edge of the bell, thus giving an audible signal that the speed of thevehi'cle has passed a predetermined limit of safety.

This striking of the bell will be repeated for each rotation of the wheel 53 aslong as the speedof the vehicle remains above thesafety limit. V I

What I claim is-p- In a speedometer for vehicles, an alarm apparatus comprising a rotatable .member geared for receiving motion at a'speed proportionate to the speed of the vehicle, a pair of counterbalancing weights mounted in said i .545 member for slidable movement radially there- '1 of under centrifugal force, springs opposing 5 outward movement of said weights, a p n carried by one of'said weights and adapted to project beyond the periphery of said rotatable member under the centrifugal movement of said weight, and a signaling device vdisposed in the path of said pin and adapted to be actuated thereby to produce anaudible signal. i 5 In testimony whereof Ijhave signedmy name to this specification.

PER ANDER SSON KOURTZMAN. 

